In the first large-scale trial, vitamin D appears to be protective against dementia. Eighteen hundred older English adults had both their vitamin D levels and their cognitive (mental) ability measured. The study found a clear and significant association between vitamin D and cognitive performance, with those having the lowest level of the nutrient scoring worse in tests and those with the highest level scoring the best. The researchers took into account other risk factors for poor cognitive performance including age, gender, education, ethnicity, season of testing.
Our comment: It is widely accepted that vitamin D levels typically decline with age. A vitamin D test is cheap and simple - ask your GP. Supplementation of vitamin D is cheap and highly effective at raising blood levels of vitamin D.

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